SU707968A1

SU707968A1 - Blasting tuyere of blast furnace

Info

Publication number: SU707968A1
Application number: SU772519971A
Authority: SU
Inventors: Анатолий Яковлевич Семенко; Иван Тимофеевич Хомич; Виталий Павлович Лялюк
Original assignee: Предприятие П/Я В-8253
Priority date: 1977-08-16
Filing date: 1977-08-16
Publication date: 1980-01-05

Description

(54) ДУТЬЕВАЯ ФУРМА ДОМЕННОЙ ПЕЧИ(54) BOTTOM FURM DOMAIN FURNACE

Изобретение относитс к металлургии и может использоватьс в шахтных печах, например доменных.The invention relates to metallurgy and can be used in shaft furnaces, for example blast furnaces.

Известна фурма дл подачи воздуха и газообразного реагента в доменную печь, содержаща полый водоохлаждаемый корпус и расположенную в верхней его части трубку дл ввода реагента в воздушный поток, пропущенную через полость корпуса и имеющую выступающую в рабочий канал фурмы часть, котора установлена перпендикул рно оси фурмы и снабжена сменным наконечником , выполнением из жаростойкого ,и высокотеплопроводного материала 1 .A known lance for supplying air and gaseous reagent to the blast furnace, comprising a hollow water-cooled body and a tube in the upper part of the tube for introducing the reagent into the air flow passed through the body cavity and having a portion protruding into the lance working channel perpendicular to the lance axis and equipped with a replaceable tip, made of heat-resistant, and highly heat-conducting material 1.

Недостатком известного устройства вл етс сравнительно низка стойкость сменных наконечников, а также всей фурмы вследствие прогара корпуса холодильника в месте наибол ьшего отложени солей и шлама из охлаж- дающей воды.A disadvantage of the known device is the relatively low resistance of the replaceable tips, as well as the entire tuyere due to burnout of the refrigerator body in the place of the greatest deposition of salts and cuttings from the cooling water.

Наиболее близким к изобретению по технической сущности и достигаемому результату вл етс дутьева фурма доменной печи, включающа корпус , выполненный из покрытых огнеупорной изол цией тепловых трубок.Closest to the invention in its technical essence and the achieved result is a blast tuyere of a blast furnace, comprising a body made of heat-resistant coated heat-insulated insulation.

жестко скрепленных флакцг - ме;кду собой, концы которых выведены з выполненный заодно с фланцем колмдевой вод ной холодильник и трубопровод подвода топливных добавок 2,rigidly fastened flags - me; by myself, the ends of which are derived from a water cooler and a pipeline for supplying fuel additives 2, which are integral with the flange of the Kolmdeva,

Основным недостатком известной дутьевой фурмы доменной печи вл етс неэффективное смешивание природного газа с дутьем, характеризующеес The main disadvantage of the known blast furnace tuyere is the inefficient mixing of natural gas with blast, characterized by

0 высокой концентрацией водорода в газе на периферии печи и низкой степенью , его использовани .0 high concentration of hydrogen in the gas at the periphery of the furnace and a low degree of its use.

Целью изобретени вл етс улучшение смешивани топливных добавок The aim of the invention is to improve the mixing of fuel additives.

5 с дутьем и повышение стойкости дутье-вой фурмы доменной печи.5 with blast and increase the resistance of the blast tuyere of the blast furnace.

Поставленна цель достигаетс благодар атому, что трубопровод снабжен сменным наконечником и коаксиально The goal is achieved thanks to the atom that the pipeline is equipped with a replaceable tip and coaxially

0 размещен вместе с ним в тепловой трубке.0 placed with him in the heat pipe.

На фиг. 1 изображена дутьева фурма предлагаемой конструкции в разрезе; на фиг. 2 - сечение А-А FIG. 1 shows the blowing lance of the proposed construction in section; in fig. 2 - section AA

5 фиг. 1.5 of FIG. one.

Claims

The blast lance includes a ras1: heat pipes 1, which are laid along the generators and rigidly fastened together. Pipe 2 for supplying fuel additives is made coaxial and equipped with a replaceable tip 3, which is installed coaxially in a heat pipe. The tip is deployed in opposite flow to blow. Internal pipelines supply, for example, natural gas or other fuel additives. With simultaneous supply of several fuel additives, such as gas and fuel oil, to the working tank of the tuyere, the lance can be equipped with several coaxially arranged pipes with interchangeable tips. The pipeline 2 is located above the horizontal axis of the tuyere, for example at an angle of 45. The replaceable tip 3 is connected to the pipeline 2 by means of a detachable connection, for example a threaded one. Heat pipes 1 and pipeline 2 are covered with a layer of fire resistant insulation 4 made of wear-resistant heat-resistant ceramics, for example, corundum. The ends of the heat pipes 1 are led out through the flange 5, with which they are rigidly connected, to the annular water cooler 6. The pipeline 2 is rigidly connected to the pipe 7, through which gas flows from the main line. Supply and discharge of water in the ring cooler b were carried out through the pipes 8. The flange 5 has a hole in the center with a spherical bottom for connection to the nozzle. The working channel of the tuyere is provided with a screen 9 made, for example, of alumonitri and boron. In the screen 9 there is a hole through which the interchangeable tip 3 is passed. The blower lance works in the following manner. . The blowing into the blast furnace is smoked in the working channel of the tuyere with gas coming through the pipe 7, pipe 2 and the replaceable tip 3. The outlet of the replaceable tip 3 is reversed and blown into the stream, which ensures better mixing of the gas with the blowing and more complete combustion of the mixture in operation than blast furnace space. Heat transmitted to the tuyere by means of heat pipes is discharged into an annular water cooler 6 and carried away by cooling water circulating in it. Glueing the refractory insulation 4 protects them from mechanical wear and reduces heat removal from the working space of the blast furnace. Heat transferred to the replaceable tip 3, made in the form of a coaxial heat pipe, leads through the pipe 2 also into the annular water cooler 6. Thanks to the intense heat removal from the replaceable tip located coaxially in the heat pipe with super thermal conductivity, as well as a pipeline for supplying gas and other fuel additives to the working channel of the tuyere, located above the horizontal axis of the tuyere in less heat-stressed areas, increases the resistance of the tuyere. The use of interchangeable nozzles deployed in the opposite direction of the blowing flow allows to ensure the long-term operation of the blast furnace with efficient mixing of the fuel additives with the blowing. DETAILED DESCRIPTION OF THE INVENTION A blast tuyere of a blast furnace comprising a housing consisting of heat pipes coated with refractory insulation, rigidly fastened with a flange between themselves, the ends of which are led out into an annular cooler and a pipeline for supplying fuel additives to the tuyere, which is different in order to improve mixing the additives with blast and increasing its durability, the pipeline is equipped with a replaceable tip and is coaxially placed with it in the heat pipe. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 290045, cl. From 21 to 7/16, 1971.

2. USSR author's certificate number 410094, cl. From 21 to 7/16, 1970.